US20160104914A1 - Rechargeable battery - Google Patents
Rechargeable battery Download PDFInfo
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- US20160104914A1 US20160104914A1 US14/838,299 US201514838299A US2016104914A1 US 20160104914 A1 US20160104914 A1 US 20160104914A1 US 201514838299 A US201514838299 A US 201514838299A US 2016104914 A1 US2016104914 A1 US 2016104914A1
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- rechargeable battery
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- electrode assembly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0468—Compression means for stacks of electrodes and separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- peripheral devices such as touch pens and stylus pens, each with respective diameters of several millimeters, have been developed and used.
- the electrode assembly 10 is formed by winding the first electrode 11 , the second electrode 12 , and the separator 13 in a jelly roll configuration.
- first and second beading portions 33 and 34 of the case 30 compress the first and second gaskets 51 and 52 , respectively, fastening forces of the first and second terminals 21 and 22 and the first and second beading portions 33 and 34 can be further increased.
- the fixing portion 35 Because the fixing portion 35 is depressed after the electrode assembly 10 is inserted into the case 30 , the fixing portion 35 contacts an outermost side of the electrode assembly 10 .
Abstract
A rechargeable battery includes an electrode assembly having first and second electrodes at opposite sides of a separator and wound about an axis; a first terminal coupled to the first electrode through a first tab; a second terminal coupled to the second electrode through a second tab; a case accommodating the electrode assembly and including first and second openings at its opposite ends; a first gasket between the first terminal and the first opening, the first gasket sealing the first opening and allowing the first terminal to protrude outside of the case; and a second gasket between the second terminal and the second opening, the second gasket sealing the second opening and allowing the second terminal to protrude outside of the case. The case may further include a fixing portion at its inner side that protrudes toward the electrode assembly.
Description
- This application claims priority to and the benefit of Korean Patent Application No. 10-2014-0136201 filed in the Korean Intellectual Property Office on Oct. 8, 2014, the entire contents of which are incorporated herein by reference.
- 1. Field
- The present invention relates to a rechargeable battery.
- 2. Description of the Related Art
- Rechargeable batteries can be classified into small-size cylindrical and prismatic types, large-sized prismatic types, etc., depending on their sizes and capacities.
- As technology develops and demand for mobile devices increases, the demand for small-sized cylindrical and prismatic rechargeable batteries as an energy source has increased.
- In general, a rechargeable battery includes an electrode assembly with electrodes at opposite sides of a separator and wound in a jelly roll shape, a case for accommodating the electrode assembly, and a cap assembly for closing an opened side of the case.
- With advancements in technology for mobile devices, peripheral devices such as touch pens and stylus pens, each with respective diameters of several millimeters, have been developed and used.
- However, a rechargeable battery with an ultra-small diameter for use in such devices has not been previously developed.
- In the rechargeable battery with an ultra-small diameter, the electrode assembly may move inside the case due to a work tolerance in coupling electrodes and terminals of the electrode assembly.
- The above information disclosed in this Background section is only for enhancement of understanding of the background of the present invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.
- One or more embodiments of the present invention provide a pin type rechargeable battery having an ultra-small diameter.
- One or more embodiments of the present invention provide a rechargeable battery that is capable of preventing (or minimizing) movement of an electrode assembly inside a case.
- A rechargeable battery according to an exemplary embodiment of the present invention includes: an electrode assembly with a first electrode and a second electrode at opposite sides of a separator and wound about an axis; a first terminal coupled to the first electrode through a first tab and a second terminal coupled to the second electrode through a second tab; a case accommodating the electrode assembly and including a first opening and a second opening at opposite ends of the case; and a first gasket between the first terminal and the first opening and a second gasket between the second terminal and the second opening to seal the respective openings and allow the respective terminals to protrude outside of the case. The case may further include a fixing portion at its inner side that protrudes toward the electrode assembly.
- The fixing portion may be depressed in a diametrical center of the case.
- The fixing portion may be formed as a curved convex protrusion that is symmetrical in a length direction of the case and is directed toward the electrode assembly.
- The first gasket may be between the first opening and the first terminal that seals the first opening and allows the first terminal to protrude outside of the case; and the second gasket may be between the second opening and the second terminal that seals the second opening and allows the second terminal to protrude outside of the case.
- A length of the first tab may be longer than a first gap between the electrode assembly and the first terminal.
- A length of the second tab may be longer than a second gap between the electrode assembly and the second terminal.
- The case may include beading portions that are depressed toward a diametrical center at connecting portions where the first and second terminals and the first and second tabs are coupled in the first and second openings, respectively.
- Uncoated regions of the first and second electrodes and the first and second tabs may be welded to each other.
- The case may be formed of aluminum, stainless steel, or a synthetic resin material.
- The case may have a diameter between about 2 mm and about 5 mm.
- The first and second electrodes may be wound two to five times.
- As described above, in an exemplary embodiment of the present invention, the first gasket is between the first terminal coupled to the first electrode of the electrode assembly through the first tab and the first opening of the case and the second gasket is between the second terminal coupled to the second electrode of the electrode assembly through the second tab and the second opening of the case to allow the first and second terminals to protrude outside of opposite ends of the case and to seal the first and second openings, respectively, thereby forming the pin type of rechargeable battery having an ultra-small diameter.
- In addition, since the fixing portion at the inner side of the case holds the electrode assembly, movement of the electrode assembly inside the case can be prevented or minimized.
-
FIG. 1 is a perspective view of a rechargeable battery according to an embodiment of the present invention. -
FIG. 2 is an exploded perspective view ofFIG. 1 . -
FIG. 3 is a cross-sectional view ofFIG. 1 taken along the line III-III. -
FIG. 4 is an exploded perspective view of an electrode assembly ofFIG. 2 . -
FIG. 5 is a cross-sectional view of a rechargeable battery according to another embodiment of the present invention. - The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.
- As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
- The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification.
-
FIG. 1 is a perspective view of a rechargeable battery according to one or more embodiments of the present invention. - Referring to
FIG. 1 , therechargeable battery 1 is a pin type battery with a diameter of several millimeters. For example, the diameter may be between about 2 mm and about 5 mm. -
FIG. 2 is an exploded perspective view ofFIG. 1 , andFIG. 3 is a cross-sectional view ofFIG. 1 taken along the line III-III. - Referring to
FIGS. 2 and 3 , therechargeable battery 1 of the first exemplary embodiment includes anelectrode assembly 10 for charging and discharging, first andsecond terminals electrode assembly 10, acase 30 for accommodating theelectrode assembly 10 and an electrolyte solution, and first andsecond gaskets second terminals case 30. - The electrolyte solution may be inserted into the
case 30 to interact with theelectrode assembly 10. - The
electrode assembly 10 includes afirst electrode 11 and asecond electrode 12 at opposite sides of aseparator 13. Theseparator 13 is an insulator. - The
electrode assembly 10 is formed by winding thefirst electrode 11, thesecond electrode 12, and theseparator 13 in a jelly roll configuration. - For example, the first and
second electrodes separator 13 may be wound between two to five times around acore 14. - The diameter of the
rechargeable battery 1 and the thickness of theseparator 13 and the first andsecond electrodes electrode assembly 10 to between two and five. - For example, when the first and
second electrodes rechargeable battery 1 may not provide a required capacity, and the diameter of therechargeable battery 1 may exceed 5 mm when the first andsecond electrodes - The first and
second electrodes regions uncoated regions -
FIG. 4 is an exploded perspective view of the electrode assembly ofFIG. 2 . - Referring to
FIGS. 2 to 4 , thefirst terminal 21 is coupled to thefirst electrode 11 and thesecond terminal 22 is coupled to thesecond electrode 12. - The
first terminal 21 is coupled to theuncoated region 112 of thefirst electrode 11 through afirst tab 61. - The
second terminal 22 is coupled to theuncoated region 122 of thesecond electrode 12 through asecond tab 62. - The
case 30 is provided with afirst opening 31 and asecond opening 32 at its opposite ends to accommodate theelectrode assembly 10. - For example, the
case 30 is cylindrically formed to accommodate the cylindrically-formedelectrode assembly 10. - The
rechargeable battery 1 is a pin type battery having an ultra-small diameter wherein its outer diameter is set by thecase 30. - The
first terminal 21 is coupled to thefirst electrode 11 of theelectrode assembly 10 by thefirst tab 61 through thefirst opening 31. Similarly, thesecond terminal 22 is coupled to thesecond electrode 12 of theelectrode assembly 10 by thesecond tab 62 through thesecond opening 32. - For example, the
first tab 61 is welded to theuncoated region 112 of thefirst electrode 11 and thesecond tab 62 is welded to theuncoated region 122 of thesecond electrode 12. - In some embodiments, the first and
second tabs second electrodes - In these embodiments, a process for welding the first and second tabs with the uncoated regions of the first and second electrodes, respectively, may be omitted.
- The
first terminal 21 may include aplate portion 211 that seals thefirst opening 31 and a protrudingportion 212 that protrudes from theplate portion 211. Similarly, thesecond terminal 22 may include aplate portion 221 that seals thesecond opening 32 and a protrudingportion 222 that protrudes from theplate portion 221. - The
plate portions second terminals second tabs portions second terminals rechargeable battery 1. - The
first gasket 51 is interposed between thefirst terminal 21 and thefirst opening 31 of thecase 30. Thefirst gasket 51 and thefirst terminal 21 seal thefirst opening 31 and thefirst gasket 51 electrically insulates the first terminal 21 from thefirst opening 31 of thecase 30, and allows the protrudingportion 212 of thefirst terminal 21 to protrude out of thecase 30. - The
second gasket 52 is interposed between thesecond terminal 22 and thesecond opening 32 of thecase 30. Thesecond gasket 52 and thesecond terminal 22 seal the second opening and thesecond gasket 52 electrically insulates the second terminal 22 from thesecond opening 32 of thecase 30, and allows the protrudingportion 222 of thesecond terminal 22 to protrude out of thecase 30. - A length L1 of the first tab 61 (i.e., the length of the
first tab 61 protruding from the uncoated region 112) is longer than a first gap G1 between one end of theelectrode assembly 10 and thefirst terminal 21. - Accordingly, the
first tab 61 may electrically couple theuncoated region 112 of thefirst electrode 11 and thefirst terminal 21. - For this purpose, the
first gasket 51 includes afirst tab hole 511. - The
first tab 61 is curved according to thefirst tab hole 511. - A length L2 of the second tab 62 (i.e., the length of the
second tab 62 protruding from the uncoated region 122) is longer than a second gap G2 between the other end of theelectrode assembly 10 and thesecond terminal 22. - Accordingly, the
second tab 62 may electrically couple theuncoated region 122 of thesecond electrode 12 and thesecond terminal 22. - For this purpose, the
second gasket 52 includes asecond tab hole 521. - The
second tab 62 is curved according to thesecond tab hole 521. - For example, the
first gasket 51 is combined to thefirst terminal 21 that is coupled to thefirst electrode 11 of theelectrode assembly 10 through thefirst tab 61 and thesecond gasket 52 is combined to thesecond terminal 22 that is coupled to thesecond electrode 12 of theelectrode assembly 10 through thesecond tab 62. - The first and
second gaskets second openings case 30 and are respectively fixed to the first andsecond openings case 30 by a crimping process. - First and
second beading portions case 30 and are respectively depressed toward diametrical centers of the first andsecond openings - The first and
second gaskets second beading portions second terminals case 30 and respectively seal the first andsecond openings - Accordingly, the first and
second beading portions second openings case 30 to correspond to respective connecting portions between the first andsecond terminals second tabs - The
case 30 may be formed of a metal, for example, aluminum or stainless steel, that forms the first andsecond beading portions - The
first beading portion 33 is depressed toward the diametrical center near the interface of thefirst terminal 21 and thefirst tab hole 511, and thesecond beading portion 34 is depressed toward the diametrical center near the interface of thesecond terminal 22 and thesecond tab hole 521. - Accordingly, while the first and
second beading portions case 30 compress the first andsecond gaskets second terminals second beading portions - In one or more embodiments, the first and
second gaskets - As described above, the first and
second tabs second terminals second tabs second electrodes electrode assembly 10, respectively, and then inserting one side of theelectrode assembly 10 into thecase 30. The first andsecond gaskets second terminals second gaskets second openings second beading portions rechargeable battery 1. - For example, while the first and
second openings case 30 are opened, the first andsecond tabs second terminals second terminals second tabs - Subsequently, the first and
second gaskets second terminals second openings case 30 to form the first andsecond beading portions rechargeable battery 1 easier. - Referring back to
FIGS. 1 to 3 , thecase 30 is further provided with a fixingportion 35 that protrudes toward theelectrode assembly 10 from an inner side of thecase 30. - The fixing
portion 35 is depressed toward a diametrical center of thecase 30 from a longitudinal center portion thereof. - Because the fixing
portion 35 is depressed after theelectrode assembly 10 is inserted into thecase 30, the fixingportion 35 contacts an outermost side of theelectrode assembly 10. - Accordingly, the
electrode assembly 10 does not move (or movement of theelectrode assembly 10 is limited or minimized) in a length direction inside thecase 30. - For example, in the
rechargeable battery 1 the length L1 of thefirst tab 61 is longer than the first gap G1, and the length L2 of thesecond tab 62 is longer than the second gap G2 to allow the first andsecond terminals second tabs - Thus, the
electrode assembly 10 may remain fixed, or substantially fixed, inside thecase 30. - In the first exemplary embodiment, the fixing
portion 35 continues (e.g., continues without interruption or breaks) along a circumference (e.g., along an entire circumference) of the longitudinal center portion of thecase 30. - In one or more embodiments, there may be a plurality of fixing portions that are spaced apart from each other in the length direction.
- In one or more embodiments, the fixing portion may have a predetermined length in the length direction of the case, or there may be one fixing portion or a plurality of fixing portions that are spaced apart from the circumferential at the center portion.
- Another exemplary embodiment of the present disclosure follows.
-
FIG. 5 is a cross-sectional view of a rechargeable battery according to one or more embodiments of the present invention. - Referring to
FIG. 5 , therechargeable battery 2 includes a fixingportion 55 is formed as a curved convex protrusion directed toward theelectrode assembly 10. - The curved convex protrusion may allow the
electrode assembly 10 to be compressively inserted into acase 230. - For example, the
case 230 may be formed of a synthetic resin material. - In one or more embodiments, when the
electrode assembly 10 is inserted into thecase 230, thecase 230 is deformed in a diametrical direction to allow insertion of theelectrode assembly 10. - When the case is formed of a synthetic resin material, the fixing portion may be ultraviolet cured and then heat-shrunk after it is expanded to allow for insertion of the electrode assembly.
- As such, the electrode assembly may be easily inserted into the case.
- While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
-
- 1, 2: rechargeable battery
- 10: electrode assembly
- 11, 12: first, second electrode
- 13: separator
- 14: core
- 21, 22: first, second terminal
- 30, 230: case
- 31, 32: first, second opening
- 33, 34: first, second beading portion
- 35, 55: fixing portion
- 51, 52: first, second gasket
- 61, 62: first, second tab
- 111, 121: coated region
- 112, 122: uncoated region
- 211, 221: plate portion
- 212, 222: protruding portion
- 511, 521: first, second tab hole
- G1, G2: first, second gap
- L1, L2: length
Claims (10)
1. A rechargeable battery comprising:
an electrode assembly comprising first and second electrodes at opposite sides of a separator and wound about an axis;
a first terminal coupled to the first electrode through a first tab;
a second terminal coupled to the second electrode through a second tab;
a case accommodating the electrode assembly and having first and second openings at opposite ends of the case;
a first gasket between the first terminal and the first opening, the first gasket sealing the first opening and allowing the first terminal to protrude outside of the case; and
a second gasket between the second terminal and the second opening, the second gasket sealing the second opening and allowing the second terminal to protrude outside of the case, wherein the case further comprises a fixing portion at its inner side that protrudes toward the electrode assembly.
2. The rechargeable battery of claim 1 , wherein the fixing portion is depressed in a direction toward a diametrical center of the case.
3. The rechargeable battery of claim 2 , wherein the fixing portion comprises a curved convex protrusion that is symmetrical in a length direction of the case and protrudes toward the electrode assembly.
4. The rechargeable battery of claim 1 , wherein a length of the first tab is longer than a first gap between the electrode assembly and the first terminal.
5. The rechargeable battery of claim 1 , wherein a length of the second tab is longer than a second gap between the electrode assembly and the second terminal.
6. The rechargeable battery of claim 1 , wherein the case comprises a first beading portion and a second beading portion, and wherein the first beading portion is depressed toward a diametrical center of the first opening at a connecting portion of the first terminal and the first tab and the second beading portion is depressed toward a diametrical center of the second opening at a connecting portion of the second terminal and the second tab.
7. The rechargeable battery of claim 1 , wherein an uncoated region of the first electrode is welded to the first tab and an uncoated region of the second electrode is welded to the second tab.
8. The rechargeable battery of claim 1 , wherein the case is comprises aluminum, stainless steel, or a synthetic resin material.
9. The rechargeable battery of claim 1 , wherein the case has a diameter between about 2 mm and about 5 mm.
10. The rechargeable battery of claim 1 , wherein the first and second electrodes are wound two to five times.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2014-0136201 | 2014-10-08 | ||
KR1020140136201A KR102249892B1 (en) | 2014-10-08 | 2014-10-08 | Rechargeable battery |
Publications (2)
Publication Number | Publication Date |
---|---|
US20160104914A1 true US20160104914A1 (en) | 2016-04-14 |
US9793572B2 US9793572B2 (en) | 2017-10-17 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/838,299 Active US9793572B2 (en) | 2014-10-08 | 2015-08-27 | Rechargeable battery |
Country Status (2)
Country | Link |
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US (1) | US9793572B2 (en) |
KR (1) | KR102249892B1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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US9793572B2 (en) | 2017-10-17 |
KR20160042359A (en) | 2016-04-19 |
KR102249892B1 (en) | 2021-05-10 |
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